Omap35xxPkg/Library/BeagleBoardSystemLib/BeagleBoardSystemLib.c

/** @file

  Copyright (c) 2008-2009, Apple Inc. All rights reserved.
  
  All rights reserved. This program and the accompanying materials
  are licensed and made available under the terms and conditions of the BSD License
  which accompanies this distribution.  The full text of the license may be found at
  http://opensource.org/licenses/bsd-license.php

  THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
  WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.

**/

#include <Uefi.h>

#include <Library/ArmLib.h>
#include <Library/CacheMaintenanceLib.h>
#include <Library/MemoryAllocationLib.h>
#include <Library/IoLib.h>
#include <Library/PcdLib.h>
#include <Library/DebugLib.h>
#include <Library/UefiBootServicesTableLib.h>
#include <Library/BeagleBoardSystemLib.h>

#include <Omap3530/Omap3530.h>

VOID
ResetSystem (
  IN EFI_RESET_TYPE   ResetType
  )
{
  switch (ResetType) {
    case EfiResetWarm:
      //Perform warm reset of the system.
      GoLittleEndian(PcdGet32(PcdFlashFvMainBase));
      break;
    case EfiResetCold:
    case EfiResetShutdown:
    default:
      //Perform cold reset of the system.
      MmioOr32 (PRM_RSTCTRL, RST_DPLL3);
      while ((MmioRead32 (PRM_RSTST) & GLOBAL_COLD_RST) != 0x1);
      break;
  }

  //Should never come here.
  ASSERT(FALSE);
}

VOID
ShutdownEfi (
  VOID
  )
{
  EFI_STATUS              Status;
  UINTN                   MemoryMapSize;
  EFI_MEMORY_DESCRIPTOR   *MemoryMap;
  UINTN                   MapKey;
  UINTN                   DescriptorSize;
  UINTN                   DescriptorVersion;
  UINTN                   Pages;

  MemoryMap = NULL;
  MemoryMapSize = 0;
  do {
    Status = gBS->GetMemoryMap (
                    &MemoryMapSize,
                    MemoryMap,
                    &MapKey,
                    &DescriptorSize,
                    &DescriptorVersion
                    );
    if (Status == EFI_BUFFER_TOO_SMALL) {

      Pages = EFI_SIZE_TO_PAGES (MemoryMapSize) + 1;
      MemoryMap = AllocatePages (Pages);
    
      //
      // Get System MemoryMap
      //
      Status = gBS->GetMemoryMap (
                      &MemoryMapSize,
                      MemoryMap,
                      &MapKey,
                      &DescriptorSize,
                      &DescriptorVersion
                      );
      // Don't do anything between the GetMemoryMap() and ExitBootServices()
      if (!EFI_ERROR (Status)) {
        Status = gBS->ExitBootServices (gImageHandle, MapKey);
        if (EFI_ERROR (Status)) {
          FreePages (MemoryMap, Pages);
          MemoryMap = NULL;
          MemoryMapSize = 0;
        }
      }
    }
  } while (EFI_ERROR (Status));

  //Clean and invalidate caches.
  WriteBackInvalidateDataCache();
  InvalidateInstructionCache();

  //Turning off Caches and MMU
  ArmDisableDataCache();
  ArmDisableInstructionCache();
  ArmDisableMmu();
}